The Red Dragon (赤の竜 'Aka no Ryuu') is the Guardian Diety of Nil Kamui, and gives his power to the pledgor of Nil Kamui (i.e. the King) which Ibuki is recognised as. Though to use the Red Dragon's power, one must offer up a soul in exchange, which Ibuki is forced to do when he first makes his contract. The Red Dragon is currently burning down villages and towns alike in the center of Nil Kamui for reasons unknown even though it is the Guardian Diety.